The chemicals used only last for a short time, usually about 6 months, although this varies from person to person. So colour or curl will 'fall' out after a while.
Even if the process was permanent, your hair continues to grow, so the colour or curl will not be in the hair coming out of your scalp.
The term, 'permanent' was invented because this treatment lasts a lot longer than a rinse or hair curlers.
17.1 percent of NFL players
16 percent of NBA players
29.6 percent of MLB players
20.2 percent of NHL players
Diabetes for sure, I believe heart disease and high blood pressure I think but I know diabetes 100%